Run openGL from remote computer

Hi,

I am trying to run app of OPENGL from a computer that has no hardware for it. but I am running it from connecting in remote to another computer that support it.
It doest work...
Does someone has any idea why?

VirtualGL is an open source program that redirects the 3D rendering commands from Unix and Linux OpenGL applications to 3D accelerator hardware in a dedicated server and displays the rendered output interactively to a thin client located elsewhere on the network.